Pixel‐Isolated Flexible Scintillators Enabled by a Woven Mesh Architecture for X‐Ray Imaging With High Contrast

ABSTRACT Flexible X‐ray detectors with suppressed optical crosstalk are essential for contrast‐retentive in high spatial resolution imaging. However, optical crosstalk in indirect flexible scintillators leads to rapid contrast degradation at high spatial frequencies, fundamentally limiting high‐performance X‐ray imaging. Here, we introduce a woven mesh architecture that enables pixel‐isolated flexible scintillators by geometrically confining scintillation photons within individual pixel units. By loading CsCdCl 3 :Mn 2+ microcrystals into a flexible woven metal mesh, large‐area flexible scintillators with tunable pixel pitches are constructed. Owing to effective suppression of lateral photon diffusion, the flexible scintillators exhibit contrast‐retentive X‐ray imaging behavior, maintaining an ultra‐high Michelson contrast of 0.71 even at a high spatial frequency of 12.5 lp mm −1 , whereas conventional thin‐film scintillators show pronounced contrast collapse. The scintillators exhibit a high light yield of 51 040 photons MeV −1 , and low detection limit of 64 nGy s −1 , mechanical flexibility, while remaining the scalability for areas exceeding 1200 cm 2 . This work establishes a manufacturable architectural strategy for pixel‐isolated, contrast‐retentive X‐ray imaging at high spatial frequencies.